JP2600033Y2 - Car navigation system - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-vehicle navigation device, and more particularly, to a convenient on-vehicle navigation device for examining a road over several maps.

[0002]

2. Description of the Related Art In a conventional on-vehicle navigation device, when a map adjacent to a map on a display screen is called, for example, a map shown in FIG. 4A is displayed on the screen, and a map shown in FIG. When a key (shown by oblique lines) on the right side of the map call key is pressed, an adjacent map on the right side shown in FIG. 4B is displayed on the screen.

[0003]

[Problem to be Solved by the Invention] In the above-described on-vehicle navigation device, when a road is searched over several maps, it is difficult to understand which point on the new map corresponds to the point being searched when the map changes. Met.

[0004] The present invention has been made in view of the above points, and an object of the invention is to provide a vehicle-mounted navigation system that makes it easy to determine the connection of a road to an adjacent map when examining the road over several maps. It is to provide a device.

[0005]

SUMMARY OF THE INVENTION The in-vehicle navigation apparatus of the present invention performs a recording medium reading apparatus for reading data from a storage medium storing map information, moves a cursor on a map, calls an adjacent map, and operates the system. An image processing apparatus for drawing a map and a cursor on a video memory based on the data read by the input device and the data read by the recording medium reading device and the cursor position information input from the input device and displaying the map and the cursor on a display device, and controlling the entire device In an in-vehicle navigation device equipped with a system controller, when an adjacent map is called when a cursor displayed on a display device is moved to an end of a display map by an input device for performing the operation of moving the cursor, the cursor is first displayed. Search for adjacent maps of the same scale as the existing map, and there is no adjacent map of the same scale If are those searched by one step smaller magnification scale, and configured to display a cursor on the corresponding location to the position of the cursor it has been displayed before and displays the retrieved map screen.

[0006]

According to the vehicle navigation system of the present invention, when examining a road on a map, when the cursor is moved to an end position on the screen of the road and the adjacent map is called, the cursor corresponds to the adjacent map. Since it is displayed at the place, it is possible to easily know the road connection over the adjacent map.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An on-vehicle navigation device according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a configuration of an in-vehicle navigation device according to an embodiment of the present invention. G
The PS receiver 5a is a receiver that receives radio waves from artificial satellites of the GPS (Global Positioning System).

[0008] The signal received by the GPS receiver 5a is input to the vehicle position calculation device 5b. Own vehicle position calculation device 5b
Calculates the position of the receiver, that is, the position of the own vehicle from the input information, and sends the information to the system controller 1.
The GPS receiver 5a and the vehicle position calculating device 5b constitute the vehicle position detecting device 5.

The system controller 1 uses the key input input to the input device 4 and the information obtained from the own vehicle position detecting device 5 to store a map in which the own vehicle position exists or an arbitrary map designated by the key input as a CDROM. A command for reading from the map database 2 is output to the recording medium reading device 3 which is a CDROM driver. The recording medium reading device 3 reads map data from the map database 2 based on the command and outputs the map data to the system controller 1.

The system controller 1 includes a map information read from the map database 2 and a vehicle position detecting device 5.
The drawing data is output to the graphic controller 6a based on the vehicle position information obtained from the vehicle or the cursor position information on the map moved by the cursor switch of the input device 4.

The graphic controller 6a develops drawing data in the video RAM 6b in accordance with an instruction from the system controller 1, outputs a synchronizing signal, and causes the display device 6c to display a screen. The graphic controller 6a, the video RAM 6b, and the display device 6c allow the
Is configured.

Next, the operation of this embodiment will be described with reference to FIG. The flowchart in FIG. 2 shows the operation in the mode for checking an arbitrary map in the map database 2.

First, in step S1, a map is selected based on the position information (longitude, latitude, etc.) obtained from the vehicle position detecting device or the input device, and the selected map is read out from the CDROM and displayed on the display device. .

Next, in step S2, a cursor is superimposed on the map and displayed, and the flow waits for a key input for moving the cursor from the input device. If there is a key input in step S2, the process proceeds to step S3, and the cursor is moved and displayed according to the key input.

As shown in FIG. 3D, four cursor switches are provided at the top, bottom, left and right, and when the right switch is pressed, the cursor moves to the right. When the upper switch and the right switch are simultaneously pressed, the cursor moves to the upper right. When another switch is pressed, the cursor moves in the corresponding direction.

Next, in step S4, it is determined whether or not the cursor is located at the edge of the map. If the cursor is not located at the edge of the map, the process proceeds to step S2,
If the cursor is located at the end of the map, step S5
Move to

In step S5, it is determined whether or not the call switch for the adjacent map is pressed. If the switch is pressed, the process proceeds to step S6, and if not, the process proceeds to step S2.

In step S6, it is determined whether or not there is an adjacent map of the same scale as the currently displayed map. If there is an adjacent map, the flow proceeds to step S9, and if there is no adjacent map, the flow proceeds to step S7. I do.

At step S7, the current scale is reduced by one step, and the routine goes to step S8. In step S8, it is determined whether or not there is an adjacent map of the reduced scale determined in step S7, and if there is an adjacent map, the process proceeds to step S9,
If there is no adjacent map, the process proceeds to step S2.

In step S9, the adjacent map of the currently determined scale is read from the CDROM and displayed on the display device. The center map shown in FIG. 3A is displayed on the screen, and when the call switch of the adjacent map is pressed while the cursor is at each of 1c to 8c, each of the adjacent maps A to H is called. .

When the cursor is moved to the end of the map as shown in FIG.
As shown in (c), a cursor is displayed at a corresponding position on the adjacent map. Then, after Step S9 is executed, Step S1 and the subsequent steps are repeated.

[0022]

According to the in-vehicle navigation device of the present invention, the connection of roads can be known when the adjacent map is called, so that it is convenient to check the roads over several maps.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an in-vehicle navigation device according to an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the on-vehicle navigation device.

FIG. 3 is a diagram showing an example of a display screen and a cursor switch of the on-vehicle navigation device.

FIG. 4 is a diagram showing an example of a display screen of a conventional in-vehicle navigation device and an adjacent map call switch.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 System controller 2 Map database 3 Recording medium reading device 4 Input device 5 Own vehicle position detecting device 6 Image processing device

Claims (1)

(57) [Scope of request for utility model registration] 1. A recording medium reading device for reading data from a storage medium storing map information, an input device for moving a cursor on a map, calling an adjacent map, and operating a system, and data read by the recording medium reading device. And a video processing device that draws a map and a cursor on a video memory based on cursor position information input from an input device and displays it on a display device, and a vehicle-mounted navigation device including a system controller that controls the entire device. When the adjacent map is called when the cursor displayed in is moved to the end of the display map by the input device for performing the cursor movement operation, first, an adjacent map of the same scale as the displayed map is searched for, If there is no adjacent map of the same scale, search by reducing the scale by one step. Is displayed on the screen and a cursor is displayed at a position corresponding to the position of the previously displayed cursor.